Voltammetric diagnostics of pesticide thiram was studied in plant leafs in vivo fluid with DNA immobilized on a carbon nanotube electrode (DCE). Sensor properties of carbon nanotube (CE) and DNA immobilized nanotube were compared. DCE was more effective than CE in target detecting. The parameters such as pH strength, stripping accumulation, amplitude, and increment potential were examined to find the optimum condition for detection of pesticide thiram in a sesame leaf. The optimized conditions were as follows 550 Hz frequency, 0.15 V amplitude, 0.005 V increment potential, -1.2 V initial potential, 4.78 pH, 500 sec accumulation time. Under optimum condition, the detection limit of thiram was attained at 0.01ng/L.

Abstract
 1. Introduction
 2. Materials and Methods
  2.1. Apparatus, Reagents, and Procedure
 3. Results and Discussion
  3.1. Comparison of cyclic voltammetric sensor
  3.2. SW stripping voltammetric parameters
  3.3. Statistics and applications
 4. Conclusion
 References

• Chang-Hyun Lee(Division of General Education, Pyeongtaek University) Corresponding Author
• Suw-Young Ly(Biosensor Research Institute, Seoul National University of Technology)